According to Nielsen’s May survey of mobile consumers in the U.S., 38 percent now own smartphones. And 55 percent of those who purchased a new handset in the past three months reported buying a smartphone instead of a feature phone, up from 34 percent just a year ago.

Leading the charge are Android phones, with the iPhone — the device that arguably started the smartphone and mobile broadband revolution — in second place. But that position is a little misleading given the iPhone is a single device from one company, whereas Android is an operating system used on a bunch of phones from a bunch of different companies.